Observation of Large-Scale Anisotropy in Very-High-Energy Cosmic Ray Protons with LHAASO-KM2A
文献类型：会议论文
| 作者 | Cao, Zhen1,2,29; Aharonian, F.2,25,26,27; Bai, Y. X.2,29; Bao, Y. W.28; Bastieri, D.30; Bi, X. J.1,2,29; Bi, Y. J.2,29; Bian, W.28; Bukevich, A. V.31; Cai, C. M.32 |
| 出版日期 | 2025-12-30 |
| 会议日期 | 2025-07-15 |
| 会议地点 | Geneva, Switzerland |
| 卷号 | 501 |
| DOI | 10.22323/1.501.0286 |
| 英文摘要 | We present a measurement of large-scale anisotropies in high-purity protons utilizing the Large High Altitude Air Shower Observatory (LHAASO). We analyzed data collected over three years from the kilometer-squared array (KM2A). Proton data was selected using a cut based on the ratio of muonic to electromagnetic components, akin to the gamma/background discrimination method used in KM2A. The proton sample achieved a purity of up to 80%, with reconstructed energies ranging from 10 TeV to 220 TeV. We conducted an analysis of the energy evolution of dipole anisotropy in protons within this energy range and identified that the turnover energy in amplitude and phase occurs at a lower energy compared to samples of heavier nuclei. © Copyright owned by the author(s) |
| 产权排序 | 第27完成单位 |
| 资助机构 | National Natural Science Foundation of China[12273114] |
| 会议录 | Proceedings of Science
 |
| 文献子类 | Conference article (CA) - |
| 学科主题 | 物理学 ; 高能物理学 ; 天文学 ; 天体物理学 ; 高能天体物理学 ; 星系与宇宙学 |
| 语种 | 英语 |
| URL标识 | 查看原文 |
| 资助项目 | National Natural Science Foundation of China[12273114] |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/28943]  |
| 专题 | 星系类星体研究组 |
| 作者单位 | 1.University of Chinese Academy of Sciences, Beijing, 100049, China; 2.TIANFU Cosmic Ray Research Center, Sichuan, Chengdu, China; 3.Key Laboratory of Cosmic Rays, Tibet University, Ministry of Education, Tibet, Lhasa, 850000, China; 4.School of Astronomy and Space Science, Nanjing University, Jiangsu, Nanjing, 210023, China; 5.Department of Physics, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, Hong Kong; 6.Hebei Normal University, Hebei, Shijiazhuang, 050024, China; 7.Key Laboratory of Radio Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100101, China; 8.School of Physics and Astronomy, Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Guangdong, Zhuhai, 519000, China; 9.School of Physics, Guangdong, Guangzhou, 510275, China; 10.Institute of Frontier and Interdisciplinary Science, Shandong University, Shandong, Qingdao, 266237, China; |
| 推荐引用方式 GB/T 7714 | Cao, Zhen,Aharonian, F.,Bai, Y. X.,et al. Observation of Large-Scale Anisotropy in Very-High-Energy Cosmic Ray Protons with LHAASO-KM2A[C]. 见:. Geneva, Switzerland. 2025-07-15. |
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来源：云南天文台
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